My husband and I rented one of our best friend's beach houses for a week. We'd never done it before but thought it would be great for the kids when they offered it to us cheap. We are about the same age as them. She looks a lot like me. We are both slim blonds about the same height. We have a circle of friends we get together with a lot. She is kind of the prude of the group. Never getting in our hot tub. Never really talking about sex. Acting like we shouldn't talk about men other than out husbands. That kind of thing.

We stayed there from a Saturday to Saturday. They usually stay there all summer but couldn't be there that week so they offered it to us. The house is a small ranch built on a little hill. There is an area at the base of a short stairway outside the kitchen where they store their trash barrels and beach stuff and things like that just outside their kitchen. It's built into the hill so no one can really see anything but the top of your head when you're out there unless they come behind the house.

On Monday morning I was cleaning up and putting the trash out while my husband and kids were out doing go carts or something. I went into the house to wash the dishes. The door opened and someone came in. I figured my husband had forgotten something. Then I felt hands on my ass and wondered what was up because my husband isn't very affectionate. I looked down and saw a pair of a black man's hands circle my waist and grab my boobs giving them a nice hard squeeze while pressing an impressive hard-on against my ass. I tried to turn around but he was all over me, one hand on a boob and the other rubbing down between my legs. I yelled and finally got turned around. The poor guy nearly fainted. He yelled "Oh shit" and said he was sorry. He thought I was our friend!!!!!!!!!! Our prudish friend was having a secret affair with some black guy!!!!! He said he lives a few doors down and "just stopped in." After apologizing again and again he got the hell out of there.

That afternoon when I was home alone again he knocked on the door and asked to come in. We had coffee and he apologized again. He was a very nice guy. He asked me very sincerely not to say anything about what happened to anyone and asked me to keep it to myself that he and my friend where having an affair. He was very worried I'd either tell her husband or tell her that I knew which he said would devastate her. I wouldn't have ever said anything anyway but I agreed. I asked him how it started.

He said that they knew each other for years from vacationing on the same street. He said that he and his ex-wife were frequent guests of our friends. Now that's he's single he stops in for visits when he can. He said that a couple of years ago, he was over while our friend's husband was away for a few days. He said that they had wine and she confessed to being frustrated in her marriage because she and her husband almost never had sex. They ended up sleeping together that night and have been doing so ever since.

He came back a couple of times the rest of the week only when I was home alone. On Friday he told me he found me attractive and asked me if I wanted to have sex with him. I was certainly flattered and intrigued, especially since I had felt his rather large hard-on earlier in the week and was very curious about it, but I turned him down. I can be a little wild but cheating isn't my thing. I've kept this too myself for almost three years now but I've been dying to say something to her or anyone at least. No one here will have any idea who I am so thanks!